In this interview, recorded at QCon London 2014, Trisha Gee talks to Charles Humble about MongoDB, her work on the Java driver, her development set-up, what she’s interested in in Java 8, and what excites her about writing software.

Deepak Giridharagopal explains the config management and automation tool Puppet, the concept of Immutable Deployments, and how Puppet DB (written in Clojure) allows to monitor and query systems managed with Puppet. Also: why PuppetDB is written in Clojure.

Sadek talks about the origins of Playframework, motivations behind 2.0 rewrite and Scala integration. He explains how important is it to have appropriate architecture and programming model while dealing with Realtime. He then reveals some features of the newly released 2.1 version.

Jeff talks about the powerful features that come with Grails 2 and how it can be used as a rapid application development framework. He also compares it with Rails and Django and explains how it can be combined with other components from the Spring portfolio.